<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>document-structure</title>
</head>
<body>
    <header>
        <h1></h1>
        <nav></nav>
    </header>
    <main>
        <article>
            <h1></h1>
            <section></section>
            <aside></aside>
        </article>
    </main>
    <footer>
        <p></p>
    </footer>
</body>
</html>